01 -
Cook ground beef in a skillet over medium heat, seasoning with garlic powder, salt, and black pepper. Drain excess fat and set aside.
02 -
In a 6-quart slow cooker, mix cooked beef, marinara sauce, beef broth, chopped onion, diced bell pepper, and Italian seasoning thoroughly.
03 -
Stir uncooked rotini pasta into the mixture until evenly coated. Arrange 10 slices of turkey pepperoni on top.
04 -
Cover and cook on low for 3 to 4 hours, stirring halfway through and checking pasta for tenderness.
05 -
When pasta is tender, sprinkle shredded mozzarella and cheddar cheeses evenly over the top, then add the remaining 10 pepperoni slices.
06 -
Cover and cook for an additional 15 to 20 minutes until cheeses are fully melted and bubbling.
07 -
Allow to sit for 10 minutes to thicken before serving.